a_utctm.c revision 279264
1/* crypto/asn1/a_utctm.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59#include <stdio.h> 60#include <time.h> 61#include "cryptlib.h" 62#include "o_time.h" 63#include <openssl/asn1.h> 64 65#if 0 66int i2d_ASN1_UTCTIME(ASN1_UTCTIME *a, unsigned char **pp) 67 { 68#ifndef CHARSET_EBCDIC 69 return(i2d_ASN1_bytes((ASN1_STRING *)a,pp, 70 V_ASN1_UTCTIME,V_ASN1_UNIVERSAL)); 71#else 72 /* KLUDGE! We convert to ascii before writing DER */ 73 int len; 74 char tmp[24]; 75 ASN1_STRING x = *(ASN1_STRING *)a; 76 77 len = x.length; 78 ebcdic2ascii(tmp, x.data, (len >= sizeof tmp) ? sizeof tmp : len); 79 x.data = tmp; 80 return i2d_ASN1_bytes(&x, pp, V_ASN1_UTCTIME,V_ASN1_UNIVERSAL); 81#endif 82 } 83 84 85ASN1_UTCTIME *d2i_ASN1_UTCTIME(ASN1_UTCTIME **a, unsigned char **pp, 86 long length) 87 { 88 ASN1_UTCTIME *ret=NULL; 89 90 ret=(ASN1_UTCTIME *)d2i_ASN1_bytes((ASN1_STRING **)a,pp,length, 91 V_ASN1_UTCTIME,V_ASN1_UNIVERSAL); 92 if (ret == NULL) 93 { 94 ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ERR_R_NESTED_ASN1_ERROR); 95 return(NULL); 96 } 97#ifdef CHARSET_EBCDIC 98 ascii2ebcdic(ret->data, ret->data, ret->length); 99#endif 100 if (!ASN1_UTCTIME_check(ret)) 101 { 102 ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ASN1_R_INVALID_TIME_FORMAT); 103 goto err; 104 } 105 106 return(ret); 107err: 108 if ((ret != NULL) && ((a == NULL) || (*a != ret))) 109 M_ASN1_UTCTIME_free(ret); 110 return(NULL); 111 } 112 113#endif 114 115int ASN1_UTCTIME_check(ASN1_UTCTIME *d) 116 { 117 static const int min[8]={ 0, 1, 1, 0, 0, 0, 0, 0}; 118 static const int max[8]={99,12,31,23,59,59,12,59}; 119 char *a; 120 int n,i,l,o; 121 122 if (d->type != V_ASN1_UTCTIME) return(0); 123 l=d->length; 124 a=(char *)d->data; 125 o=0; 126 127 if (l < 11) goto err; 128 for (i=0; i<6; i++) 129 { 130 if ((i == 5) && ((a[o] == 'Z') || 131 (a[o] == '+') || (a[o] == '-'))) 132 { i++; break; } 133 if ((a[o] < '0') || (a[o] > '9')) goto err; 134 n= a[o]-'0'; 135 if (++o > l) goto err; 136 137 if ((a[o] < '0') || (a[o] > '9')) goto err; 138 n=(n*10)+ a[o]-'0'; 139 if (++o > l) goto err; 140 141 if ((n < min[i]) || (n > max[i])) goto err; 142 } 143 if (a[o] == 'Z') 144 o++; 145 else if ((a[o] == '+') || (a[o] == '-')) 146 { 147 o++; 148 if (o+4 > l) goto err; 149 for (i=6; i<8; i++) 150 { 151 if ((a[o] < '0') || (a[o] > '9')) goto err; 152 n= a[o]-'0'; 153 o++; 154 if ((a[o] < '0') || (a[o] > '9')) goto err; 155 n=(n*10)+ a[o]-'0'; 156 if ((n < min[i]) || (n > max[i])) goto err; 157 o++; 158 } 159 } 160 return(o == l); 161err: 162 return(0); 163 } 164 165int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str) 166 { 167 ASN1_UTCTIME t; 168 169 t.type=V_ASN1_UTCTIME; 170 t.length=strlen(str); 171 t.data=(unsigned char *)str; 172 if (ASN1_UTCTIME_check(&t)) 173 { 174 if (s != NULL) 175 { 176 if (!ASN1_STRING_set((ASN1_STRING *)s, 177 (unsigned char *)str,t.length)) 178 return 0; 179 s->type = V_ASN1_UTCTIME; 180 } 181 return(1); 182 } 183 else 184 return(0); 185 } 186 187ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t) 188 { 189 return ASN1_UTCTIME_adj(s, t, 0, 0); 190 } 191 192ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t, 193 int offset_day, long offset_sec) 194 { 195 char *p; 196 struct tm *ts; 197 struct tm data; 198 size_t len = 20; 199 int free_s = 0; 200 201 if (s == NULL) 202 { 203 free_s = 1; 204 s=M_ASN1_UTCTIME_new(); 205 } 206 if (s == NULL) 207 goto err; 208 209 210 ts=OPENSSL_gmtime(&t, &data); 211 if (ts == NULL) 212 goto err; 213 214 if (offset_day || offset_sec) 215 { 216 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) 217 goto err; 218 } 219 220 if((ts->tm_year < 50) || (ts->tm_year >= 150)) 221 goto err; 222 223 p=(char *)s->data; 224 if ((p == NULL) || ((size_t)s->length < len)) 225 { 226 p=OPENSSL_malloc(len); 227 if (p == NULL) 228 { 229 ASN1err(ASN1_F_ASN1_UTCTIME_ADJ,ERR_R_MALLOC_FAILURE); 230 goto err; 231 } 232 if (s->data != NULL) 233 OPENSSL_free(s->data); 234 s->data=(unsigned char *)p; 235 } 236 237 BIO_snprintf(p,len,"%02d%02d%02d%02d%02d%02dZ",ts->tm_year%100, 238 ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec); 239 s->length=strlen(p); 240 s->type=V_ASN1_UTCTIME; 241#ifdef CHARSET_EBCDIC_not 242 ebcdic2ascii(s->data, s->data, s->length); 243#endif 244 return(s); 245 err: 246 if (free_s && s) 247 M_ASN1_UTCTIME_free(s); 248 return NULL; 249 } 250 251 252int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t) 253 { 254 struct tm *tm; 255 struct tm data; 256 int offset; 257 int year; 258 259#define g2(p) (((p)[0]-'0')*10+(p)[1]-'0') 260 261 if (s->data[12] == 'Z') 262 offset=0; 263 else 264 { 265 offset = g2(s->data+13)*60+g2(s->data+15); 266 if (s->data[12] == '-') 267 offset = -offset; 268 } 269 270 t -= offset*60; /* FIXME: may overflow in extreme cases */ 271 272 tm = OPENSSL_gmtime(&t, &data); 273 /* NB: -1, 0, 1 already valid return values so use -2 to 274 * indicate error. 275 */ 276 if (tm == NULL) 277 return -2; 278 279#define return_cmp(a,b) if ((a)<(b)) return -1; else if ((a)>(b)) return 1 280 year = g2(s->data); 281 if (year < 50) 282 year += 100; 283 return_cmp(year, tm->tm_year); 284 return_cmp(g2(s->data+2) - 1, tm->tm_mon); 285 return_cmp(g2(s->data+4), tm->tm_mday); 286 return_cmp(g2(s->data+6), tm->tm_hour); 287 return_cmp(g2(s->data+8), tm->tm_min); 288 return_cmp(g2(s->data+10), tm->tm_sec); 289#undef g2 290#undef return_cmp 291 292 return 0; 293 } 294 295 296#if 0 297time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s) 298 { 299 struct tm tm; 300 int offset; 301 302 memset(&tm,'\0',sizeof tm); 303 304#define g2(p) (((p)[0]-'0')*10+(p)[1]-'0') 305 tm.tm_year=g2(s->data); 306 if(tm.tm_year < 50) 307 tm.tm_year+=100; 308 tm.tm_mon=g2(s->data+2)-1; 309 tm.tm_mday=g2(s->data+4); 310 tm.tm_hour=g2(s->data+6); 311 tm.tm_min=g2(s->data+8); 312 tm.tm_sec=g2(s->data+10); 313 if(s->data[12] == 'Z') 314 offset=0; 315 else 316 { 317 offset=g2(s->data+13)*60+g2(s->data+15); 318 if(s->data[12] == '-') 319 offset= -offset; 320 } 321#undef g2 322 323 return mktime(&tm)-offset*60; /* FIXME: mktime assumes the current timezone 324 * instead of UTC, and unless we rewrite OpenSSL 325 * in Lisp we cannot locally change the timezone 326 * without possibly interfering with other parts 327 * of the program. timegm, which uses UTC, is 328 * non-standard. 329 * Also time_t is inappropriate for general 330 * UTC times because it may a 32 bit type. */ 331 } 332#endif 333